Preverb
句首助动词, 前动词(即移至句子第一个位置上的助动词)
🗣️ 情景例句
There are three things that have to be done first, Harry.
首先我们必须做三件事， Harry。
Sorry. Was I disturbing you?
对不起，我刚才打扰你了吗？
No, I think it'll be all right for him to go to school.
不，我想他去上学没什么关系。